JPH0611084Y2 - Dispersion stirrer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In the present invention, when manufacturing paints, inks and the like, a medium as a raw material and a dispersion medium such as beads and steel balls are mixed in a vessel. The present invention relates to an improvement of a dispersion stirrer in which a medium is dispersed and stirred by a stirring blade, the medium is separated from the stirred object to be treated, and the dispersed medium is discharged from the discharge port to the outside of the machine.

[Conventional technology]

As this type of dispersion stirrer, the one shown in FIG. 2 and the one shown in FIG. 3 have been widely known.

The former, that is, the dispersion stirrer shown in Fig. 2, has a gap separator on the outlet wall (8 ') of the vessel (1') which is a stirring tank.
(9 ') is arranged, and the gap separator (9') and stirring blade
Rotor (1 attached to the stirring shaft (2 ') equipped with (3')
0 ') and a predetermined gap (X) is formed, the medium is separated from the object to be stirred in this gap, and the dispersed medium is discharged from the carry-out port (4'). It is like this.

On the other hand, the latter, that is, the dispersion stirrer shown in FIG. 3, has a fixed screen (11 ') inside the discharge port (4 ") of the vessel (1') which is a stirring tank.
The medium is separated from the object stirred in (11 ′), and the dispersed medium is discharged from the discharge port (4 ″).

[Problems to be solved by the device]

The former, that is, the gap separator (9 ') and the rotor (1
In the type that separates the medium from the object to be stirred, which is agitated in the gap formed with (0 '), narrowing the gap (X) causes a large pressure loss, which greatly limits the treatment amount. There is a drawback that

On the other hand, in the latter case, that is, in the case of the type in which the medium is separated from the object to be treated stirred by the fixed screen (11 '),
There is a drawback that media such as beads concentrate on the screen portion and cause clogging. This drawback can be solved to some extent by arranging a rotating screen rotatably instead of the fixed screen (11 ') in the vessel which is the stirring tank.

However, even if the rotating screen is rotating, the screen portion is still likely to be clogged with media. The smaller the holes formed in the screen portion, the stronger the tendency.

An object of the present invention is to make it difficult for the medium to be jammed in the screen portion of the rotating screen.

[Means for Solving the Problems]

In order to achieve this object, the present invention has a cylindrical rotating screen (5) rotatably arranged in a vessel (1), and a shaft (6) of the rotating screen (5) and a stirring blade (3) are provided. This is a dispersion stirrer in which the stirring shaft (2) which is a shaft is a separate shaft, and the rotating screen (5) is eccentrically attached to the shaft (6).

[Action]

The rotating screen (5) separates the medium from the object to be stirred in the vessel (1), but the medium that tends to get stuck in the screen (5a) due to the eccentric motion during rotation of the rotating screen (5) is shaken. To be dropped. Therefore, it is possible to prevent the medium from gathering and sticking to the screen (5a) portion.

〔Example〕

 An embodiment of the present invention will be described with reference to FIG. 1 of the accompanying drawings.

The dispersion stirrer shown in the example is a vessel (1) which is a stirring tank.
Are horizontal type (horizontal direction in FIG. 1), and a stirring shaft (2) is provided in the cylindrical vessel (1), and the stirring shaft (2) has a disc shape. A plurality of stirring blades (3) are attached. Then, in the vessel (1), a medium bead, which is a medium, can be charged from a medium supply port (not shown) in a required amount, and a medium such as a pigment, a resin, and a solvent is not shown on the left injection port. It can be sent by pressure.

The outlet (4) on the outlet side (right side of the figure) in this vessel (1)
Is formed and this outlet in the vessel (1) is
Place the rotating screen (5) in front of (4) (on the left side of the figure). The structure of the rotary screen (5) will be described more specifically. A cylindrical screen (5a) and an end plate (5) fitted to one of the left and right ends (the one farther from the discharge port (4)).
b) and the other end plate (5 close to the outlet (4))
c) and a shaft (6) which is a rotating shaft. A plurality of holes (5d) are formed in the end plate (5c) closer to the discharge port (4).

In the dispersion stirrer shown in the embodiment, the shaft (6) of the rotating screen (5) and the stirring shaft (2) which is the rotating shaft of the stirring blade (3) are separated as shown in FIG. And is driven by a separate drive source (not shown).
The separate shaft (6) and the stirring shaft (2) are both concentric with the center line L of the vessel (1) as shown in the drawing, but the rotary screen (5) is It is mounted eccentric to the shaft (6) by t. By doing so, the medium that tends to be blocked in the screen (5a) portion is shaken off due to the eccentric movement during the rotation of the rotary screen (5) during the dispersion and stirring in the vessel (1).

In the dispersion stirrer in the example, a rotary screen
A gap separator (9) is arranged outside the (5) (right side in FIG. 1) and on the outlet wall (8) of the vessel (1), and the gap separator (9) and the rotating screen ( By forming a predetermined gap with 5), the medium can be separated from the agitated object even in this gap. However, as long as the medium is prevented from reaching the outlet (4) through the gap between the rotating screen (5) and the outlet wall (8) during the dispersion and stirring in the vessel (1), this gap separator (9 ) Is not necessary.

In addition, the cylindrical peripheral wall of the vessel (1) has a double structure, and an annular chamber is formed between them, and this portion is called a jacket (7). By passing cooling water through the jacket (7), the temperature rise in the vessel (1) that occurs during the stirring operation can be suppressed.

A necessary amount of beads as a medium is introduced into the vessel (1) from a medium supply port (not shown), and the medium is pressure-fed into the vessel (1) from an injection port on the left side (not shown). Then, the stirring shaft (2) to which the stirring blade (3) is attached and the shaft (6) of the rotary screen (5) are rotated by separate drive sources. Then, the beads and the medium, which are the medium, are dispersed and stirred in the vessel (1) by the stirring blade (3) and moved to the right side in FIG. 1, and as shown by the arrow in the figure, the rotating screen (5) is moved. Reach the place.

Then, the beads as the medium are separated from the agitated object by the screen (5a), and only the medium is removed by the screen (5a).
It flows into the rotating screen (5) which is rotating through the part a) and is discharged from the discharge port (4) through the hole (5d) as shown by an arrow in FIG.

By the way, when the beads as a medium are separated by a rotating rotating screen (5), beads as a medium are less likely to be clogged without gathering in the screen (5a) portion, but it is not always perfect. I can't say. However, since the rotating screen (5) is mounted eccentrically with respect to its axis (6) by t, the eccentric movement during its rotation causes the medium that is trying to get stuck in the screen (5a) part to be shaken off. Become. Therefore, it is possible to prevent the medium from gathering and sticking to the screen (5a) portion.

If the shaft (6) of the rotating screen (5) and the stirring shaft (2) to which the stirring blades (3) are attached are separate shafts as described above, it is not possible to change the rotation speed of both. Easy Then, in this case, it is better to rotate the shaft (6) of the rotary screen (5) at a lower speed than the stirring shaft (2) to which the stirring blade (3) is attached. This way, Vessel
The wear of the rotating screen (5) which is rotating during the dispersion and stirring in (1) can be minimized.

[Effect of device]

According to the present invention, since it is possible to prevent the medium from gathering and sticking to the screen portion by the eccentric movement during rotation, not only can more ideal dispersion stirring work be performed, There is an effect that the function of the dispersion stirrer can be maintained for a longer time.

[Brief description of drawings]

FIG. 1 of the accompanying drawings is a sectional view of only an essential part showing an embodiment of a dispersion stirrer according to the present invention, and FIGS. 2 and 3 are sectional views of only an essential part showing an example of a conventional dispersion stirrer. ,. (1) …… Bessel, (2) …… Stirring shaft, (3) …… Stirring blade,
(4) …… Outlet, (5) …… Rotating screen, (6) …… Axis.

Claims (1)

[Scope of utility model registration request] 1. A medium and a dispersion medium are mixed in a vessel (1), and the medium is dispersed and stirred by a stirring blade (3), and the medium is separated from the stirred object to be processed and the dispersed medium is discharged. A dispersion stirrer of the type discharged from the outlet to the outside of the machine, in which the cylindrical rotating screen (5) is rotatably arranged in the vessel (1), and the shaft (6) of the rotating screen (5) and the aforesaid In a dispersion stirrer in which the stirring shaft (2) which is the shaft of the stirring blade (3) is a separate shaft, the rotating screen (5) is eccentrically mounted with respect to the shaft (6). Dispersion stirrer.